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Taking what I’ve learned and did with the left shifter I was able to breeze through with the right shifter.  First, I marked the unused limits of the ratchet drum.  This will let me know how far I can go with my shaving.
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Before the work, with more markings not different from how a surgeon prepares his canvas.
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And after… Not much weight saved at all.  I realized that the nature of the cutout shape is too difficult to mimic so I made it different.  Same style, but different.